It is not clear if Kashmiri's possible death -- which U.S. officials cannot confirm at this time -- was a result of intelligence shared by the Pakistanis, but on Friday a senior Pakistani official confirmed reports that a joint U.S-Pakistani intelligence team had been created specifically to go after militants.

Here are the militants with the distinction of being featured on the terror short list:

Ilyas Kashmiri, 'The Next Osama Bin Laden'

Ilyas Kashmiri joined the ranks of America's most wanted terrorists in April when the U.S. State Department announced a $5 million reward for information leading to his location.

Kashmiri is the commander of Harakut-ul-Jihad al-Islami, an al Qaeda-connected terror group believed to be responsible for several attacks in India and Pakistan, and allegedly provides logistical support for al Qaeda, according to the U.S. State Department. Kashmiri was considered a top possible contender for the leadership role for core al Qaeda following Osama bin Laden's death in May and had been referred to as "the next Osama bin Laden."

Pakistani government officials said early Monday they are "100 percent" sure Kashmiri was killed in a U.S. drone strike in Pakistan's South Waziristan last week, but several U.S. officials said they have not been able to confirm the death.

Sources told ABC News that after the drone attack, which claimed 16 lives, several of the bodies were blown beyond recognition.
READ: Al Qaeda Leader Reported Killed By U.S. Missile Attack in Pakistan

Ayman al-Zawahiri, Bin Laden's Deputy

In the wake of Osama bin Laden's death, one of the first names to crop up as a possible replacement for the terror leader was that of his deputy, Ayman al-Zawahiri.

Al-Zawahiri, a physician and founder of the Egyptian extremist group Egyptian Islamic Jihad, also helped found al Qaeda with bin Laden. He sports the largest bounty offered for information on any terrorist by the U.S. government -- $25 million and is wanted for his role in the 1998 bombings of the U.S. embassies in Tanzania and Kenya, which claimed 224 lives.

Al-Zawahiri made a video appearance in April in which he discussed the revolt in Libya and called on Libyans to oust dictator Moammar Gadhafi before "Western aid... turns into invasions." He has not made a public statement about bin Laden's death.